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G. E. LLOYD & G. S. PARTRIDGE. STEREOTYPE PLATE FINISHING MACHINE.

No. 369,192. Patented Aug. 30', 1887.

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STEREOTYPE PLATE FINISHING MACHINE.

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G. E. LLOYD & O. S. PARTRIDGE. 'STERBOTYPE PLATE FINISHING MACHINE.

No. 369,192. Patented Aug. 30, 1887,

' N, PEYERS. PhdoLKhcgrEpber. Whhinlion, DJ;

UNITED STATES PATENT OFFICE.

GEORGE E. LLOYD AND CHARLES S. PARTRIDGE, OF CHICAGO, ILLINOIS,

ASSIGNORS TO THE A. N. KELLOGG NEWSPAPER COMPANY, OF SAME PLACE.

STEREOTYPE-PL ATE-FlNISHING MACHINE.

SPECIFICATIONforming part of Letters Patent No. 369,192, dated August 30, 1887.

Application filed January 17, 1887. Serial No. 224,554. (No model.)

To all whom it may concern.-

Be it known that we, GEORGE E. LLOYD and CHARLES S. PARTRIDGE, citizens of the United States, residing in Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Stereotype'Plate- Finishing Machines, of. which the followingis a specification.

' This invention is designed more especially to be used in the preparation or finishing for the form of that class of stereotype-plates having oneor more longitudinal legs with inclined side faces, whereby they may be locked in the form to bases having oneor more upward pro- I 5 jections adapted to engage the inclined faces of the leg. The operations to be performed by the machine are the trimming of the side edges of the plate, the trimming of the inclined face of the leg or legs, and also the formation of a horizontal under bearing-surface upon the cored or hollow part of the plate. These operations are all simultaneous, and the plate, after undergoing them in the most approved form of our machine,-is finished ready for use. Some features of the invention are, however, well adapted for-use in trimming plates which employ other modes of fastening than that mentioned and in which the longitudinal leg with the inclined side face is not present.

The invention consists, first, in the combination of two rotary cutter-heads adapted to trim the plate edges, placed opposite each other and at a distance apart corresponding to the width desired for. the plate, and an inclined rotating cutter or cutters located to operate upon the side face of the under leg or legs of the plate, with a carriage for moving the plate up to the cutters; second, 1n the combination of two independent rotary cutterheads adapted to act upon the edges of the plate, placed opposite to each other and at a distance apart corresponding to the width desired for the plate, with a reciprocating carriage adapted to move the plate up to said cutters and provided with a clamp for holdlng the plate while it is being operated upon; thlrd, in combination with the carriage for moving the plate, an inclined rotating knife of the character hereinafter set forth; fourth, in

' the inclined under cutter.

the combination, with side-trimming rotary cutters mounted upon arbors longitudinally adjustable to or from each other, of the carriage adapted to move the plate to said outters; fifth, in a plate-finishing machine having an inclined rotary cutter located under the path of the plate and adjustable, as hereinafter set forth; sixth, in the combination, in

a plate-finishing machine and with the carriage for moving the plate, a rotary cutter located and otherwise adapted to form a horizontal under bearing-surface upon the cored or hollow part of the plate. These and other features of the invention are fully described below, and illustrated in the accompanying drawings, in the latter of. which Figurel is a front elevation of our improved machine. Fig. 2 is a plan thereof. Fig. 3 is a side elevation. Fig. 4 is a partial vertical section upon the lines 1 2 and 34 of Fig. 2. Fig. 5 is a detail section of the supporting-frame of Fig. 6 is a view of the inclined cutter detached; and Fig. 7 is an enlarged View of the plate, for finishing which the machine is more especially designed.

In the accompanying drawings, in which similar letters of reference indicate like parts, A represents the frame, and A the table of the machine. Across the center of the latter are two slideways, a, upon which is reciprocated the carriage or plate-holder B. At either side of the carriage-path are located the independent rotating cutter-heads C, by which the side edges of the plate are trimmed, such heads being accurately positi0ned,so they may reduce the plate to the exact width required. Each head is provided with an adjustable tool or,

pressure whereof is constantly exerted upon the block in a direction away from said upright. It will be seen that by loosening the bolts G the block 0 and its bearing E may be moved either to or from the point of cutting in one direction by the spring and in the other by the adjusting-screw. The arbors are each held against longitudinal play by the drivingpulley J at one side of the bearing and the nuts j at the other side thereof, one of said nuts acting to lock the other. Both bearings may be adjustable, if preferred.

The plate-holding carriageis slotted throughout such portion of its length as is covered by the plate, as shown at Fig. 4, to give access to the under cutter, the plate straddling the slot. Avertieally-acting clamp, Eco-extensive with the plate in length, is mounted upon the earriage and is used to hold the plate rigidly during the time it is being trimmed. This clamp is operated from a rod, L, rotated by the leverhandle it by means of the pitman M at either end, which encircle eccentrics m, formed in or upon said rod L, and are pivotally joined to the clamp, the rod L being supported in up rights N at either end of the carriage. The boxes 0, in which the rod L isjournaled, may be depressed by the set-screws n, and are sustained by the springs 0.

To prevent injury to the printing-faces of the stereotypes the bottom of the clamp K is faced with a sheet of rubber, P.

The. inclined under cutter, R, is mounted upon an arbor, 1', supported in a frame, S, and may be driven by pulleyp through the medium of a belt passing over idle-pulleys q q. The arbor-frame Sis rigidly held at one side by a pivotal rod, 8, secured to the frame of the machine, and at the other side by suspensionbolts T, depending from the machine-frame, and it is adjustable in two directions. Thus by changing the nuts upon the pivot s the entire frame is raised or lowered in a line parallel with pivot s, or by moving the nuts upon the bolts T the frameis swung upon said pivot .9. These adjustments enable us to move the cutter in the longitudinal line of its arbor to compensate for its loss in diameter by wear and sharpening, and also to change the planes of its action either vertically or laterally.

The cutter R is novel in its construction. While an ordinary saw would answer some of the purposes of our invention, yet the form of cutter shown we regard as much preferable It is provided with two operating ends, and these ends are formed not only to give the inclined face U to the leg of the plate, but also to finish the bearing-surface o in the roof of the cored part of the plate at one and the same operation. For this latter purpose each of the cutting ends of the tool is beveled off, as shown at w.

The machine we have shown is provided with but one of the inclined cutters; but it is obvious that this cutter might be duplicated, also that an oppositely-inclined one could be added. These additions would enable the cut ting of the inclined faces of two plate-legs or eeam the cutting of both faces of a single leg. The tension-bolts T pass through lengthened openings x, to permit one of the adjustments of the frame S, which we have described.

The carriage we have illustrated is designed to be reciprocated by manual power. We do not, however, wish to be limited in this regard, as it obviously can be moved automatically.

XVe claim- 1. The combination, in a stereotype-platefinishing machine, of two rotary eutter-heads adapted to trim the plate edges, placed opposite eaeh other and at a distance apart corresponding to the width desired for the plate, and an inclined rotating cutter or cutters located to operate upon the side face of the under leg or legs of the plate,with a carriage for moving the plate up to the cutters, substantially as specified.

2. The combination, in a stereotype-plate finishing machine, of two rotary cutter-heads mounted upon the adjacent ends of two independent arbors and placed at a distance apart corresponding to the width desired for the plate,with a reciprocating carriage adapted to pass between the arbors and provided with a clamp, essentially such as described, for holding the plate, substantially as set forth.

3. The combination, in a stereotypeplatefinishing machine and with a slotted carriage for moving the plate, of an inclined rotating knife formed with two operating ends beveled off at 10, substantially as described.

4. In a stereotype-plate-finishing machine, the combination, with the two side-trimming rotary cutters, each of which is mounted upon an independent arbor longitudinally adjustable in both directions, of a carriage adapted to move the plate to said cutters, substantially as specified.

5. In a stereotypefinishing machine, the combination,with the slotted carriage for moving the plate, said carriage being provided with a clamp for securing the plate in proper position over its slot, of an inclined rotating cutter acting upon the under side of the plate and supported in operative position. under the slot of the carriage, substantially as specified.

6. The combination, in a stereotype-plate finishing machine, and with the slotted earriage thereof for moving the plate, of an inclined rotating knife located under the path of the carriage and projecting through the slot thereof, said knife being beveled at its ends, whereby the horizontal under bearingsurfaee is formed upon the cored part of the plate, substantially as specified.

7. The combination, with the carriage of a stereotype-plate-finishing machine, of a clamp for holding the plate, having a bearingsurface faced with rubber, substantially as specified.

8. The combination,with the carriage, of the clamp K, and its operating devices consisting of the rod L, its lever-handle 7c, pitman M, eccentric m upon the rod, and the supports for said rod, substantially as specified.

IIO

9. The combination,with the carriage, of the clamp K, the rod L, pitman M, the eccentrics upon the rod, and the boxes in which said rod is provided, the latter being adjustable, as set 5 forth, substantially as specified.

10. The combination,with thelcarriage,- of the clamp K, the rod L, pitman M, eccentrics upon the rod, and the boxes in which said rod is provided, the latter being sustained upon 10 springs, substantially as set forth.

11. The slotted carriage having the vertically-moving rigid clamp K, for holding the plate over the slot, in combination with an under cutter for operating upon the under surface of the plate, substantially as specified.

GEORGE E. LLOYD. CHARLES S. PARTRIDGE. 4 Witnesses:

H. M. MUNDAY, LEWIS E. CURTIS. 

